The duochrome is noticeable but not strong, and it’s probably one that would be best over black or layered than on its own. The formula was thin and a bit watery, and two coats definitely wasn’t opaque–I’d recommend at least three. The drying time was average, and the brush strokes didn’t disappear after it dried down, so if you aren’t a fan of visible brush strokes, you won’t like this formula. I have to admit that I had some sticker shock over the price per ounce ($29.27/oz. vs. $19.97/oz. for Colorstay vs. $9.98/oz. for regular), because the bottles were rather small! The quality of the formula and the subtlety of the duochrome were not worth the major increase in cost. The good news is that it wore for seven days with minor tip wear but no chipping (which is par for the course for me).